【IMPORTANT】T2R2 and STAR Search: Service Discontinuation and Successor Systems

Journal Paper

• Charlotte ORGONASI, Kenji Nishihara, Clara Luzieux, Takumi Abe, Tomohiro Okamura, Masahiko Nakase. Prediction of Plutonium content of BWR/MOX Fuel using a neural network, Annals of Nuclear Energy, Vol. 240, 112713, Aug. 2026.
• Ryo Hamada, Tomofumi Sakuragi, Hidekazu Asano, Masahiko Nakase. Trade-off between repository footprint and radiotoxicity in geological disposal of vitrified high-level waste from spent MOX fuels: Quantitative assessment of simplified minor actinide separation, Annals of Nuclear Energy, Vol. 240, 112701, July 2026.
• Tadafumi Niizato, Tomohiro Okamura, Kenji Ozone, Masahiko Nakase, Tatsuo Saito, Takao Ohi, Gento Kamei. Development Plan for a Generative AI-Based Technical Information Management System for Research Facility Waste Disposal, Journal of Earth Informatics, Vol. 37, No. 2, pp. 53-62, June 2026.
• Masahiko Nakase, Ryota Nakazawa, Ria Mishima. Mechanistic Elucidation of Platinum Group Metal Separation by Aluminum Hexacyanoferrate in Nitric Acid Systems, Next Chemical Engineering, Vol. 2, 100051, May 2026.
• Masahiko Nakase, Tomohiro Okamura, Takahiro Nishihara. Design and development of an informatics framework for actinide extractant discovery leveraging the IDEaL Database, Bulletin of the Laboratory for Zero-Carbon Energy, Laboratory for Zero-Carbon Energy, Institute of Integrated Research, Institute of Science Tokyo, Vol. 4, No. 2025, p. 27, Apr. 2026.
• Tomohiro Okamura, Takahiro Nishihara, Masahiko Nakase. TASKI: AI Based Nuclear Knowledge Management System, Bulletin of the Laboratory for Zero-Carbon Energy, Laboratory for Zero-Carbon Energy, Institute of Integrated Research, Institute of Science Tokyo, Vol. 4, No. 2025, p. 42, Apr. 2026.
• Ryota Nakazawa, Masahiko Nakase. Investigation of phase equilibrium of TiO₂–CeO₂ system for prediction of precipitated phase during solidification of radioactive waste into SYNROC, Bulletin of the Laboratory for Zero-Carbon Energy, Laboratory for Zero-Carbon Energy, Institute of Integrated Research, Institute of Science Tokyo, Vol. 4, No. 2025, p. 43, Apr. 2026.
• Masahiko NAKASE, Tatsuro MATSUMURA, Ryo HAMADA, Chi Young HAN, Go CHIBA, Tomofumi SAKURAGI, Hidekazu ASANO. Strategic Selection of Nuclear Fuel Cycle Backend Options: A Framework Incorporating MA Separation and Final Disposal by Multi-Criteria Evaluation, Annals of Nuclear Energy, Vol. 233, 112267, Mar. 2026.
• Ryota Nakazawa, Satofumi Maruyama, Ryosuke Maki, Lewis R. Blackburn, Colin Boxall, Masahiko Nakase. Comparison Study on Crystalline Phases in Ce-bearing Titanate SYNROC Synthesized by Conventional and Spark Plasma Sintering, Reviewed proceedings of Waste Management Symposia 2026 (WM2026), Mar. 2026.
• Takumi Abe, Taiga Suzuki, Tomohiro Okamura, Masahiko Nakase. Implementation of ideal cascade model for uranium enrichment to nuclear fuel cycle simulator, Annals of Nuclear Energy, Vol. 232, p. 112224, Feb. 2026.
• Saki Ozawa, Yudai Shiozawa, Yoshitaka Saijo, Tatsuya Miyajima, Daiju Matsumura, Takuya Tsuji, Masahiko Nakase, Terutaka Maehara. Redox Dynamics of Cerium Ions in Soda-Lime Glass during Cooling Analyzed by in situ X-ray Absorption Fine Structure, Journal of the American Ceramic Society, Vol. 109, Issue 3, e70621, Feb. 2026.
• Andika Putra Dwijayanto, Kenji Nishihara, Tomohiro Okamura, Masahiko Nakase. Preliminary Design and Front-end Fuel Cycle Assessment of 200 MWt Marine Molten Chloride Fast Reactor, Annals of Nuclear Energy, Vol. 229, No. 2026, p. 112124, Jan. 2026.

International Conference (Reviewed)

• Ryota Nakazawa, Satofumi Maruyama, Ryosuke Maki, Lewis R. Blackburn, Colin Boxall, Masahiko Nakase. Comparison Study on Crystalline Phases in Ce-bearing Titanate SYNROC Synthesized by Conventional and Spark Plasma Sintering, Waste Management Symposia 2026 (WM2026), Mar. 2026.

International Conference (Not reviewed / Unknown)

• Masahiko Nakase, Takahiro Nishihara, Mamura Tsuneyuki, Hisao Sato. Enhancement of the PHAST code toward an extensible geochemical simulation framework involving glass corrosion: development and preliminary application of JPHAST, 11th International Congress on Ceramics (ICC’11), Sept. 2026.
• Qiushi Wang, Ahid Nurmanjaya, Martin Duarte, Ryota Nakazawa, Masahiko Nakase. Development and Evaluation of Functionalized Diglycolamide-Based Hydrophobic Deep Eutectic Solvents for Platinum Group Metal Extraction, The 13th International Conference on Separation Science and Technology (ICSST26), Sept. 2026.
• Kenji Takeshita, Tomohiro Okamura, Masahiko Nakase, Takashi Shimada, Yuki Kinishi, Keisuke Nishimura, Hitomi Ishida, Tomoo Yamamura. Nuclear Fuel Cycle Simulation for Actinide Management Towards Sustainable Nuclear Energy Use (2) Minor Actinide Management, GLOBAL2026, Aug. 2026.
• Tomohiro Okamura, Masahiko Nakase, Kenji Takeshita, Takashi Shimada, Yuki Konishi, Keisuke Nishimura, Hitomi Ishida, Tomoo Yamamura. Nuclear Fuel Cycle Simulation for Actinide Management Towards Sustainable Nuclear Energy Use (1) Uranium and Plutonium Management, GLOBAL2026, Aug. 2026.
• Masahiko Nakase. [Invited] Studies on Waste Management and Disposal: Applications to Fukushima (1F) Decommissioning and Nuclear Fuel Cycle Systems, HHGW Research Forum 2026, July 2026.
• Andika Putra Dwijayanto, Kenji Nishihara, Tomohiro Okamura, Masahiko Nakase. Fuel Cycle Simulation for Marine Molten Chloride Fast Reactor: Verification and Case Study, TWoFCS2026 (The 7th Technical Workshop on Fuel Cycle Simulation 2026), Apr. 2026.  Official location  
• Alessio Rossi, Masahiko Nakase, Tomohiro Okamura, Kenji Nishihara. Towards a World Model of the Nuclear Fuel Cycle (1) From Past Reconstruction to Future Assessment of Fuel Demand, Waste Treatment and Strategic Stability, TWoFCS2026 (The 7th Technical Workshop on Fuel Cycle Simulation 2026), Apr. 2026.  Official location  
• Taiga Mitsuyuki, Tomohiro Okamura, Masahiko Nakase, Shinnosuke Wanaka. Strategic Roadmapping and Implementation Pathways for Nuclear-Powered Ships toward 2050 Net-Zero Shipping, TWoFCS2026 (The 7th Technical Workshop on Fuel Cycle Simulation 2026), Apr. 2026.  Official location  
• Tomohiro Okamura, Koki Ono, Taiga Suzuki, Takumi Abe, Takahiro Nishihara, Masahiko Nakase, Kenji Nishihara. NMB4 Validation Based on Historical Nuclear Power Plant Operating Records in Japan, TWoFCS2026 (The 7th Technical Workshop on Fuel Cycle Simulation 2026), Apr. 2026.  Official location  
• Kenji Nishihara, KENJI TAKESHITA, Takashi Shimada, Naoto Aizawa, Masahiko Nakase, Satoshi Wada, Shingo Wakasaki, Minefumi Matsui, Yoshiaki Yasunaga, Tomohiro Okamura, Takumi Abe, Manabu Yoshida, Hiroaki Nagano, Yoshio Kimura, Ayako Ono, Masatoshi Yamazaki, Masayuki Naganuma, Sou Watanabe, Tomoko Murakami, Tadafumi Koyama, Daisuke Watanabe, Sho Fuchita, Yuji Fukaya, Masako De Franco, Hiroshi SAGARA, Yoichiro Shimazu, Liem Peng Hong, Koji Fujikura. Benchmark Activity in Atomic Energy Society of Japan for Improvement of Reliability of Nuclear Fuel Cycle Simulators, TWoFCS2026 (The 7th Technical Workshop on Fuel Cycle Simulation 2026), Apr. 2026.  Official location  
• Masahiko Nakase, Charlotte Orgonasi, Tomohiro Okamura, Kenji Nishihara. Enhancing Economic Evaluation Frameworks for MOX Fuel Cycles through Machine Learning-Based Reactivity Prediction, TWoFCS2026 (The 7th Technical Workshop on Fuel Cycle Simulation 2026), Apr. 2026.  Official location  
• Subrata Saha, Andika Putra Dwijayanto, Alessio Rossi, Masahiko Nakase. VVER-1200 Reactor Modeling and Nuclear Fuel Cycle Simulation for the Bangladesh Nuclear Energy Scenario Using NMB 4.0, TWoFCS2026 (The 7th Technical Workshop on Fuel Cycle Simulation 2026), Apr. 2026.  Official location  

Domestic Conference (Not reviewed / Unknown)

• Kenji Takeshita, Tomohiro Okamura, Masahiko Nakase. 原子燃料の安定供給に資する核燃料サイクル政策について, The 22nd Academic Conference of the Japan Society of Maintenology : Maintenology Supporting the Nuclear "Re-Renaissance", Sept. 2026.
• Andika Putra Dwijayanto, Masahiko Nakase. Neutronic Design of Simple-Sustainable Molten Chloride Fast Reactor without Complex Reprocessing, Atomic Energy Society of Japan 2026 Autumn Meeting, Sept. 2026.  Official location  
• Andika Putra Dwijayanto, Tomohiro Okamura, Masahiko Nakase. Higher-Order Plutonium Transmutation Scenario in a 200 MWt Molten Chloride Fast Reactor with Thorium Additive, Atomic Energy Society of Japan 2026 Autumn Meeting, Sept. 2026.  Official location  
• Qiushi Wang, Ahid Nurmanjaya, Martin Duarte, Ryota Nakazawa, Masahiko Nakase. Design and Evaluation of Novel Hydrophobic Deep Eutectic Solvents for Platinum Group Metal Extraction from Nitric Acid Media, Atomic Energy Society of Japan 2026 Autumn Meeting, Sept. 2026.  Official location  
• Hidekazu Asano, Takahiro Nishihara, Tomohiro Okamura, Masahiko Nakase. TASKI:AIを基盤とした原子力ナレッジマネジメントシステム(6) 理系学部生向け地層処分講義の学習効果に関する教員採点とAIを活用した概念ネットワーク分析の比較, Atomic Energy Society of Japan 2026 Autumn Meeting, Sept. 2026.  Official location  
• Hisao Satoh, Tsuneyuki Maemura, Takahiro Nishihara, Masahiko Nakase, Tomohiro Okamura. オールジャパンで取り組む新しいオープンソース地球化学解析コードJPHASTの開発(3) 地下水－岩盤反応系を対象としたコードの機能確認, Atomic Energy Society of Japan 2026 Autumn Meeting, Sept. 2026.  Official location  
• Takahiro Nishihara, Masahiko Nakase, Tomohiro Okamura, Tsuneyuki Maemura, Hisao Satoh. オールジャパンで取り組む新しいオープンソース地球化学解析コードJPHASTの開発(2) AI統合型システム開発と将来展望：多様なコードを統合可能な解析プラットフォームの実現, Atomic Energy Society of Japan 2026 Autumn Meeting, Sept. 2026.  Official location  
• Masahiko Nakase, Takahiro Nishihara, Tsuneyuki Maemura, Tomohiro Okamura, Hisao Satoh. オールジャパンで取り組む新しいオープンソース地球化学解析コードJPHASTの開発(1) 機能と開発目標、コミュニティ形成に向けて, Atomic Energy Society of Japan 2026 Autumn Meeting, Sept. 2026.  Official location  
• KENJI TAKESHITA, Tomohiro Okamura, Masahiko Nakase. 原子燃料の安定供給に必要な核燃料サイクルフロントエンドのプロセス構成, Atomic Energy Society of Japan 2026 Autumn Meeting, Sept. 2026.  Official location  
• Ahid Nurmanjaya, Qiushi Wang, Martin DUARTE, Ryota Nakazawa, 塚本泰介, Takashi Shimada, Toru Kobayashi, Tomoo Yamamura, Masahiko Nakase. Investigation on Fuel Cycle based on Actinide Management Towards Sustainable Use of Nuclear Energy(25) Applicability of Short-Chain Amide Extractant in Fluorinated Solvents for Multielement Separation, Atomic Energy Society of Japan 2026 Autumn Meeting, Sept. 2026.  Official location  
• Tomohiro Okamura, Takashi Shimada, Masahiko Nakase, Yasutoshi Ban, Tomoo Yamamura. 持続的な原子力利用のためのアクチノイドマネジメントを備えた燃料サイクルの研究(27) 高速炉サイクル移行期におけるプルトニウムマネジメント研究, Atomic Energy Society of Japan 2026 Autumn Meeting, Sept. 2026.  Official location  
• Takashi Shimada, Tomohiro Okamura, Masahiko Nakase, KENJI TAKESHITA, Hirotaka Konishi, Hiroki Tsukamoto, Yasutoshi Ban, Tomoo Yamamura. 持続的な原子力利用のためのアクチノイドマネジメントを備えた燃料サイクルの研究(26) 高速炉が燃料サイクル持続性、柔軟性に与える影響と課題, Atomic Energy Society of Japan 2026 Autumn Meeting, Sept. 2026.  Official location  
• Ryota Nakazawa, Jessey De Roeck, Masahiko Nakase. スパークプラズマ焼結法によるU含有シンロックの作製と相状態の評価, Atomic Energy Society of Japan 2026 Autumn Meeting, Sept. 2026.  Official location  
• Ryota Nakazawa, Masahiko Nakase. An含有シンロックの相状態に及ぼすスパークプラズマ焼結法の影響, Institute for Materials Research, Tohoku University Oarai / Alpha Joint meeting, Aug. 2026.
• Ayoob Ilyas, Masahiko Nakase, Andika Putra Dwijayanto, Alessio Rossi, Hidetoshi Okada, Chris Allison, Zheng Fu, Shuying Jiang. Conceptual Design of a Compact Heat Pipe Device for Lunar Surface Power Generation, Atomic Energy Society of Japan 2026 Spring Annual Meeting, Mar. 2026.
• Andika Putra Dwijayanto, Kenji Nishihara, Tomohiro Okamura, Masahiko Nakase. The Case for Pu-fuelled Molten Chloride Fast Reactor for Nuclear Marine Propulsion, Atomic Energy Society of Japan 2026 Spring Annual Meeting, Mar. 2026.
• Andika Putra Dwijayanto, Tomohiro Okamura, Masahiko Nakase. Online or Offline? Evaluating the Refuelling Options for Marine Molten Chloride Fast Reactor, The 19th Student Research Presentation on AESJ Kanto-Koetsu Office, Mar. 2026.
• Ayoob Ilyas, Masahiko Nakase, Andika Putra Dwijayanto, Alessio Rossi, Hide Okada, Chris Allison, Zheng Fu, Shuying Jiang. Neutronic Design of a Compact Heat-Pipe Microreactor with Preliminary Thermal Evaluation for Lunar Application, Atomic Energy Society of Japan 2026 Spring Annual Meeting, Mar. 2026.
• Alessio Rossi, Masahiko Nakase, Tomohiro Okamura, Kenji Nishihara, Kouki Ono. A World Model of the Nuclear Fuel Cycle From Past Reconstruction to Future Assessment of Fuel Demand, Waste Treatment and Strategic Stability, Atomic Energy Society of Japan 2026 Spring Annual Meeting, Mar. 2026.
• Alessio Rossi, Masahiko Nakase, Tomohiro Okamura, Kenji Nishihara, Kouki ONO. Towards a World Model of the Nuclear Fuel CycleFrom Past Reconstruction to Future Assessment of Fuel Demand, Waste Treatment and Strategic Stability, Atomic Energy Society of Japan 2026 Spring Annual Meeting, Mar. 2026.
• Alessio Rossi, Masahiko Nakase, Tomohiro Okamura, Kenji Nishihara, Kouki ONO. Towards the World-Wide Modelling of the Nuclear Fuel Cycle, The 19th Student Research Presentation on AESJ Kanto-Koetsu Office, Mar. 2026.
• Ahid Nurmanjaya, Qiushi Wang, Taisuke Tsukamoto, Takashi Shimada, Tomoo Yamamura, Masahiko Nakase. Extraction behavior of Short-Chain Ligands for f-Block Elements in Novel Fluorinated Diluents, The 19th Student Research Presentation on AESJ Kanto-Koetsu Office, Mar. 2026.
• Qiushi Wang, Ahid Nurmanjaya, Masahiko Nakase. Structure–Extraction Relationship of Aromatic-Substituted TDGA Derivatives for Pd(II) in Nitric Acid Media, The 19th Student Research Presentation on AESJ Kanto-Koetsu Office, Mar. 2026.
• Masahiko Nakase. AI-Enabled Digital Twins for Nuclear Science and Engineering Studies, The 10th, Year 2025 ZC Colloquium, Workshop of faculties of MIT and Laboratory for Zero-Carbon Energy, Mar. 2026.
• Joonho LEE, Takahiro Nishihara, Masahiko Nakase. Extractant Exploration for Actinide Separation Solubility-Performance Hybrid Evaluation for ML Based Extractant Reverse Design, Atomic Energy Society of Japan 2026 Spring Annual Meeting, Mar. 2026.
• Qiushi Wang, Ahid Nurmanjaya, Masahiko Nakase. Aryl-Substituent Effects in Thiodiglycolamide Ligands: Alkyl Chain Length Modification for Enhanced Palladium(II) Extraction, Atomic Energy Society of Japan 2026 Spring Annual Meeting, Mar. 2026.
• Takashi Shimada, Tomohiro Okamura, Masahiko Nakase, Kenji Takeshita, Keisuke Nishimura, Yuki Konishi, Hiroki Tsukamoto, Koki Hibi, Hiroyuki Moriwaki, Tomoo Yamamura. 持続的な原子力利用のためのアクチノイドマネジメントを備えた燃料サイクルの研究(23)軽水炉サイクルの課題解決の視点からの高速炉サイクルの要件１, Atomic Energy Society of Japan 2026 Spring Annual Meeting, Mar. 2026.
• Tomohiro Okamura, Masahiko Nakase, Takashi Shimada, Hiroki Tsukamoto, Yuki Konishi, Keisuke Nishimura, Tomoo Yamamura. 持続的な原子力利用のためのアクチノイドマネジメントを備えた燃料サイクルの研究(22)高速炉実証炉の諸量評価研究, Atomic Energy Society of Japan 2026 Spring Annual Meeting, Mar. 2026.
• Taisuke Tsukamoto, Tasuku Orino, Keisuke Nishimura, Yuki Konishi, Hiroki Tsukamoto, Takashi Shimada, Masahiko Nakase, Yasutoshi Ban, Yasuhiro Tsubata, Tomoo Yamamura. 持続的な原子力利用のためのアクチノイドマネジメントを備えた燃料サイクルの研究(20)二次廃棄物量低減に向けたMA暫定保管体への直接転換技術の開発, Atomic Energy Society of Japan 2026 Spring Annual Meeting, Mar. 2026.
• Ahid Nurmanjaya, Qiushi Wang, Taisuke Tsukamoto, Takashi Shimada, Tomoo Yamamura, Masahiko Nakase. Investigation on fuel cycle based on actinide management towards sustainable use of nuclear energy(17) Investigation of elemental separation behavior using novel fluorinated solvents and short-chain extractants, Atomic Energy Society of Japan 2026 Spring Annual Meeting, Mar. 2026.
• Takahiro Nishihara, Tomohiro Okamura, Hidekazu Asano, Masahiko Nakase. TASKI:AIを基盤とした原子力ナレッジマネジメントシステム(5)非構造データのナレッジベース化, Atomic Energy Society of Japan 2026 Spring Annual Meeting, Mar. 2026.
• Tomohiro Okamura, Masahiko Nakase. 事例紹介1, Tokyo University of Science Education Innovation Center Symposium 2026, Feb. 2026.
• Masahiko Nakase. [招待講演] 核燃料サイクルと資源循環：核種分離がもたらす原子力の新しい価値と未来－廃棄物処分負荷低減と資源有効利用に向けて－, Kanto Branch Research Presentation Meeting of the Japan Society of Material Cycles and Waste Management, Feb. 2026.
• Takashi Shimada, Tomohiro Okamura, Masahiko Nakase, Kenji Takeshita, Yuki Konishi, Keisuke Nishimura, Hiroki Tsukamoto, Tomoo Yamamura. アクチノイドマネジメントを備えた燃料サイクルの研究(1)MA分離・暫定保管の有効性評価, 19th Seminar of the Reprocessing and Recycle Technology Division on AESJ, Jan. 2026.

Other Publication

• Masahiko Nakase, Tomohiro Okamura, Takahiro Nishihara. TWoFCS2026/NuMBAC2026 Summary Report, TWoFCS2026/NuMBAC2026 Summary Report, Apr. 2026.  Official location  

Patent

• Masahiko Nakase. 高レベル放射性物質処理システム及び高レベル放射性物質処理方法. Patent. Registered. 国立大学法人東京科学大学, 三菱重工業株式会社. 2021/05/31. 特願2021-090800. 2022/12/13. 特開2022-183462. 特許第7850975号. 2026/04/16 2026.

Research Highlight

• Masahiko Nakase, Packwood Daniel. Organizer, Group Discussion 4: "How to be both flexible and deep with your research?" in Japan Society for the Promotion of Science 17th HOPE Meeting with Nobel Laureates (International Conference organized by JSPS). 2026-2026.
• Masahiko Nakase, Tomohiro Okamura, Kenji Takeshita, Kenji Nishihara, Takumi Abe. Organizer of the 7th Technical Workshop on Fuel Cycle Simulation 2026 TWoFCS2026 & NuMBAC2026. 2026-2026.

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